Step 1

In a stand mixer with the paddle attachment on medium speed (or a large mixing bowl with a hand mixer), cream together butter and sugar until light and fluffy, about 2 minutes.

Step 2

Add in eggs and vanilla and mix until combined.

Step 3

Add flour, cream of tartar, baking soda, and salt, and mix until just combined. Cover the bowl with plastic cling wrap and chill for 20-30 minutes.

Step 4

Preheat oven to 350 F.  Line 2 large half sheet baking pans with parchment paper or a silicone baking mat.

Step 5

In a small mixing bowl, combine sugar and cinnamon and stir until incorporated.

Step 6

Scoop out about 2 tablespoons of cookie dough and roll into a ball (about 1-inch thick). Roll each cookie ball into the cinnamon-sugar to coat it completely.

Step 7

Place the cookie balls on the lined baking sheets, spacing them about 2 -3 inches apart. You will have to bake the cookies in multiple batches.

Step 8

Bake for 9-11 minutes. Allow the cookies to cool on the baking sheet for 10 minutes, then carefully transfer to a wire cooling rack to cool completely.